Barrel Crown inspection

First topic message reminder :

Good morning,

I have an odd pistol; the previous owner modified it (removed 1" of barre).  I knew it was modified prior to buying it and I accepted the risk.  It is a Hammerli Xesse SF 22lr.

Took it to the range added a dot and proceeded to bench rest it to sight in the dot.  First couple groups in sighting in were 1.5-2" groups.  As the barrel warmed up to the CCi SV I was able to get down to a 3/4" group with two fliers that opened it up to 1.5"  When shooting free hand the groups are a little bigger, say 2-2.5".  

The ergonomics and the quality of the trigger allowed me to get get more consistent groups in practice compared to my 1911 conversion so I decided to use it in this weekends match.  (My 1911 is a Nelson top that makes nice .5" holes from the bench).  I feel I did exceptionally well given this was my first match shooting one handed, 867-22. 

All that to say I am happy with the roll of the dice but I also want to get a handle on just what I have here.  Is this the typical accuracy I should expect from a current production Xesse?  Is the cut down barrel with a 90* crown the cause of the fliers?  Is it just a bullet/gun miss match and I need to find an ammo that works better with my gun?

Here is a picture of the barrel post match with firing residue.  For the trained eyes here on the forum, what do you all think of this residue pattern?

I will be trying different ammo soon enough also.

Thanks, Miguel

Jon Eulette wrote:Have David Sams recrown the pistol. He has a special fixture for that. He installs barrel liners on Hammerli’s routinely and has to do that. He’s probably the best in the country for that type of work.
Jon

+1 re crowning can not hut and improve the accuracy by roughly 1/2 inch. 25 yards hard to tell if it good. If the bullets tumble at 50 yards then you need to re crown.